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If `A` is an idempotent matrix satisfying, `(I-0. 4 A)^(-1)=I-alphaA ,w h e r eI` is the unit matrix of the name order as that of `A ,` then th value of `|9alpha|` is equal to ________.

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VMC MODULES ENGLISH-MATRICES AND DETERMINANTS -LEVEL 2
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  4. Let A=[(3x^(2)),(1),(6x)], B=[(a,b,c)], and C=[((x+2)^(2),5x^(2),2x)...

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  9. about to only mathematics

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  14. Prove without expansion that |a h+bgga b+c h bf+b afh b+b c af+b cc bg...

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  15. If y= |[sinx,cosx,sinx],[cosx,-sinx,cosx],[x,1,1]|, find (dy)/(dx)

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  16. If f(x)=|x^nn !2cosxcos(npi)/2 4sinxsin(npi)/2 8| then find the val...

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  19. If A , B ,a n dC are the angles of triangle, show that the system o...

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  20. If a x1 2+b y1 2+c z1 2=a x2 2+b y2 2+c z2 2=a x3 2+b y3 2+c z3 2=d ,a...

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